17-letter words containing o, v, i, d
- positive definite — (of a quadratic form) positive for all real values of the variables, where the values are not all zero.
- positive feedback — Electronics. the process of returning part of the output of a circuit, system, or device to the input, either to oppose the input (negative feedback) or to aid the input (positive feedback) acoustic feedback.
- potential divider — a resistor or series of resistors connected to a voltage source and used to provide voltages that are fractions of that of the source.
- private education — education provided by a private individual or organization, rather than by the state or a public body
- production values — the quality of a media production (such as a film) in regards to elements such as colours, quality, style, etc
- pseudo-aggressive — characterized by or tending toward unprovoked offensives, attacks, invasions, or the like; militantly forward or menacing: aggressive acts against a neighboring country.
- radioactive decay — decay (def 8).
- radioactive waste — the radioactive by-products from the operation of a nuclear reactor or from the reprocessing of depleted nuclear fuel.
- recorded delivery — If you send a letter or parcel recorded delivery, you send it using a Post Office service which gives you an official record of the fact that it has been posted and delivered.
- reproductive cell — gamete.
- revealed religion — religion based chiefly on the revelations of God to humans, especially as described in Scripture.
- saturation diving — a method of prolonged diving, using an underwater habitat to allow divers to remain in the high-pressure environment of the ocean depths long enough for their body tissues to become saturated with the inert components of the pressurized gas mixture that they breathe: when this condition is reached, the amount of time required for decompression remains the same, whether the dive lasts a day, a week, or a month.
- second derivative — the derivative of the derivative of a function: Acceleration is the second derivative of distance with respect to time.
- sleep deprivation — a condition in which you have not had enough sleep
- sodium-vapor lamp — an electric lamp in which sodium vapor is activated by current passing between two electrodes, producing a yellow, glareless light: used on streets and highways.
- superconductivity — the phenomenon of almost perfect conductivity shown by certain substances at temperatures approaching absolute zero. The recent discovery of materials that are superconductive at temperatures hundreds of degrees above absolute zero raises the possibility of revolutionary developments in the production and transmission of electrical energy.
- supervision order — an order by a juvenile court requiring a named probation officer or local-authority social worker to advise, assist, and befriend a child or young person who is the subject of care proceedings, over a period of up to three years
- supervisory board — a board of management of which nonmanagerial workers are members, having supervisory powers over some aspects of management decision-making
- survivor syndrome — a characteristic group of symptoms, including recurrent images of death, depression, persistent anxiety, and emotional numbness, occurring in survivors of disaster.
- the evil day/hour — If someone is putting off the evil day or the evil hour, they have to do something unpleasant and are trying to avoid doing it for as long as possible.
- to have a mind to — If you have a mind to do something, you want, intend, or choose to do it.
- traffic diversion — a special route arranged for traffic to follow when the normal route cannot be used
- turn-down service — In a hotel, a turn-down service is the preparation of a room for a guest to sleep in by slightly turning back the comforter on the bed, turning down the lights, and so on.
- underground movie — a movie produced independently on a low budget and often using experimental techniques and avant-garde themes.
- vanilla-flavoured — having been flavoured with vanilla extract or essence
- veiltail goldfish — an artificially bred, indoor variety of goldfish, usually golden or calico and of a spheroid shape, having a fully divided, drooping tail fin exceeding the body in length.
- vibrofluidization — Vibrofluidization is when vibration is used to make particles move in a fluidized bed.
- video disk player — a device that reads the information on a video disc
- videoconferencing — the holding of videoconferences.
- vila nova de gaia — a city in NW Portugal.
- visible radiation — electromagnetic radiation that causes the sensation of sight; light. It has wavelengths between about 380 and 780 nanometres
- voidable contract — a contract or agreement that is capable of being made of no legal effect or made void
- white-winged dove — a common dove, Zenaida asiatica, of the southwestern U.S. to Chile.
- wings of the dove — a novel (1902) by Henry James.
- wood preservative — a coating applied to timber as a protection against decay, insects, weather, etc
- zone of avoidance — the area of the sky in the plane of the Milky Way where interstellar dust obscures visible light so that no distant galaxies can be observed.